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File No 94342-S&G Page 3 the report was presented on June 2, 1993 The results of this limited investigation indicated contamination in the soil at the location of the product line trenches 2 On June 30, 1993, Walton Engineering removed three underground storage tanks(two- 7500 gallon, and one 5000-gallon) Soil sampling performed at the sidewalls and bottom of the excavation revealed contamination in the soil Laboratory analyses of samples of groundwater from the bottom of the excavation revealed contamination in the groundwater also The results of this investigation was presented in the Advance Soil Technology, Inc report, File No 93342-TR dated July 9, 1993 3 On July 13, 1993 a representative of Advance Soil Technology, Inc collected soil samples from the stockpiled soil (generated from tank removal) at the site The results of this investigation and sampling was presented in our report, File No 93342-NSP dated July 19, 1993 ' 4 On July 21 and 22, 1993 the stockpiled soil at the site was removed to a new location at 2480 Toste Road for aeration purposes The results of this activity was presented in our report File No 93342-RSP dated July 29, 1993 i 5 Aeration of stockpiled soil commenced on August 16, 1993 and continued until the sampling day of September 24, 1993 The results of sampling revealed no detection of jcontaminants in the soil The results of this activity was presented in our report, File No 93342-ASP dated October 4, 1993 1 2 0 Field Investigation A total of five soil borings were drilled at the site on January 5, 1994, at the locations shown in Figure 2 These borings were drilled to the depth ranging from 5 to 20 feet below the existing ground surface The borings were advanced with a truck mounted drill rig utilizing eight inch diameter hollow stem augers Soil samples were extracted as the boring progressed, by driving a modified California split spoon sampler into the ground A 140 ADVANCE SOIL TECHNOLOGY INC